<div class="form-group">
	<select name="mesas" id="mesas" class="form-control" accesskey="e">
		<?php 
			foreach($mesas as $k=>$v){	
		?>
		<option value="<?php echo $k;?>"><?php echo $v; ?></option>
		<?php
		} 
		?>
	</select>
</div>
<script>
$(document).ready(function(){
	$('#mesas').filterByText($('#textbox'), true);
});
</script>